High-elasticity-modulus lithium battery copper foil surface treatment equipment based on direct-current electrodeposition process

Abstract

The invention relates to the technical field of copper foil surface treatment, and discloses high-elasticity-modulus lithium battery copper foil surface treatment equipment based on a direct-current electrodeposition process, which comprises a base, fixed columns are symmetrically and fixedly connected to the top of the base, an electrolysis shell is fixedly connected to the tops of the two fixed columns, and a cover plate is movably connected to the outer surface of the electrolysis shell. A contact assembly used for enabling copper foil to make full contact with electrolyte is arranged above the base, the rolling shaft is indirectly made to rotate through rotation of the driving block, then the rolling shaft drives the sponge sleeve on the surface of the rolling shaft to periodically rotate forwards and backwards, it is ensured that the electrolyte can make full contact with the surface of the copper foil, and due to the flexibility and good absorptivity of the sponge sleeve, the service life of the copper foil is prolonged. The sponge sleeve can effectively adsorb and uniformly distribute the electrolyte, so that the uniformity of electrolytic deposition is greatly improved, in addition, the periodic positive and negative rotation of the rolling shaft and the sponge sleeve can effectively avoid the local over-plating or under-plating phenomenon of the copper foil in the electroplating process, and the surface quality of the copper foil is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of copper foil surface treatment, in particular to a high elastic modulus lithium battery copper foil surface treatment device based on a direct current electrodeposition process. Background Art

[0002] The high elastic modulus lithium battery copper foil surface treatment equipment based on DC electrodeposition process is mainly used to produce high-performance lithium battery copper foil. It uses DC electrodeposition process to treat the copper foil surface to improve its elastic modulus, tensile strength and other properties to meet the new energy industry's demand for high-performance lithium battery copper foil.

[0003] However, there are still some problems with the existing high elastic modulus lithium battery copper foil surface treatment equipment based on DC electrodeposition process:

[0004] First, in the existing high elastic modulus lithium battery copper foil surface treatment equipment based on direct current electrodeposition process, the clamping of copper foil is a key step, but the existence of the fixture often becomes a challenge. The fixture is used to fix the copper foil to ensure its stability and uniformity during the electroplating process. However, the traditional fixture is usually made of non-conductive materials, which will block the contact between the electrolyte and the copper foil, thereby affecting the uniformity of the electrolytic deposition process. In order to solve this problem, the prior art uses conductive materials as fixtures. This improvement does effectively reduce the blocking of the fixture to the electrolytic reaction and improves the uniformity of the copper foil surface treatment. However, the design and manufacture of the conductive fixture requires higher precision and cost. Compared with the traditional non-conductive fixture, the conductive fixture needs to have higher conductivity and stability to ensure that the current can be evenly transmitted during the electroplating process. This requires that the material selection, structural design and manufacturing process of the conductive fixture require higher technical levels and cost investment;

[0005] Secondly, the use of conductive clamps will introduce new electrochemical reactions. Since there is also the possibility of electrochemical reactions between the conductive clamps and the electrolyte, it will affect the deposition quality and performance of the copper foil surface. For example, the material of the conductive clamp reacts with certain components in the electrolyte to generate impurities or gases, which will affect the purity and flatness of the copper foil surface. In addition, the conductive performance of the clamp will decrease with the increase of electroplating time, resulting in uneven thickness of the deposited layer on the copper foil surface. Due to the obstruction of the clamp and the introduction of new electrochemical reactions, the thickness of the deposited layer on the copper foil surface is uneven, the purity is reduced, and the flatness is reduced. These problems will affect the performance and quality of the copper foil, and thus affect its application in the new energy industry.

[0006] Secondly, in the existing high elastic modulus lithium battery copper foil surface treatment equipment based on direct current electrodeposition process, when the copper foil is placed in the electrolyte, the contact time between the lower surface and the electrolyte is relatively long, and the extended contact time between the lower surface and the electrolyte will lead to excessive electrolytic reaction in this area. In the direct current electrodeposition process, the current passes through the electrolyte to reduce the metallic copper on the cathode to form an electrodeposition layer. Since the lower surface is in contact with the electrolyte for a long time, the current density in this area is relatively high, which accelerates the reduction rate of copper ions and makes the deposited copper layer thicker. Further, the uneven distribution of the deposition layer will affect the overall flatness and performance consistency of the copper foil, reducing its use effect as a high-performance lithium battery copper foil.

[0007] Secondly, long-term contact with the electrolyte can cause excessive corrosion or impurity deposition on the lower surface of the copper foil. The electrolyte usually contains a variety of ions and additives. These components will react with the copper foil during the electrolysis process to form corrosion products or impurities. Since the lower surface is in contact with the electrolyte for a long time, these adverse reactions are more likely to occur in this area, resulting in defects such as pits and spots on the surface of the copper foil, further reducing its quality.

[0008] Therefore, a surface treatment equipment for lithium battery copper foil with high elastic modulus based on direct current electrodeposition process is proposed. Summary of the invention

[0009] The purpose of the present invention is to provide a surface treatment device for lithium battery copper foil with high elastic modulus based on a direct current electrodeposition process to solve the problems raised in the above background technology.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a high elastic modulus lithium battery copper foil surface treatment device based on a direct current electrodeposition process, comprising a base, the top of the base is symmetrically fixedly connected with fixed columns, the tops of two fixed columns are fixedly connected with an electrolytic shell, the outer surface of the electrolytic shell is movably connected with a cover plate, a contact component for making the copper foil fully contact with the electrolyte is arranged above the base, and a guide component for changing the flow rate and flow direction of the electrolyte is arranged on the outer side of the electrolytic shell.

[0011] Preferably, the contact assembly includes a driving block, which is arranged below the electrolytic shell, the bottom of the electrolytic shell is symmetrically fixedly connected with a rotating seat, the driving block is rotatably connected to the inside of the rotating seat, the top of the base is symmetrically fixedly connected with a baffle, the outer surface of the baffle is slidably connected with a sliding rod, the side where the two sliding rods are close to each other is symmetrically fixedly connected with a resistance rod, and the top of the sliding rod is fixedly connected with a connecting piece.

[0012] Preferably, the contact assembly further comprises two racks, which are respectively fixedly connected to the tops of the corresponding connecting pieces, the electrolytic shell penetrates the surface and is linearly and equidistantly arranged and symmetrically rotatably connected to a plurality of rollers, the outer surfaces of the rollers located in the middle are fixedly connected to gears, the outer surfaces of the rollers on each side are transmission-connected to a power belt, and a sponge sleeve is sleeved on the side of each roller away from the gear.

[0013] Preferably, the guide assembly comprises two nozzles, which are respectively fixedly connected to two sides of the electrolytic shell, the nozzles penetrate the surface and are linearly equidistantly arranged and are symmetrically rotatably connected with guide rollers, the outer surfaces of the guide rollers away from the base are fixedly connected with rotating plates, the outer surfaces of the electrolytic shells are symmetrically fixedly connected with cylinders, the output shafts of the cylinders are fixedly connected with double-headed connecting rods, and the double-headed connecting rods are slidably connected to the inside of the rotating plates, the outer surface of each guide roller is fixedly connected with a torsion spring, the outer surface of each torsion spring is fixedly connected with a guide plate, and each guide plate has a guide hole opened through the surface.

[0014] Preferably, the driving block is drivenly installed on an external motor, and the external motor is electrically controlled to start and stop by an external controller. The driving block is composed of three concentric ellipses, and the angle between each ellipse and the other two ellipses is one hundred and twenty degrees. The gear and rack are meshed with each other, and the sponge sleeve is made of polytetrafluoroethylene sponge material.

[0015] Preferably, the cylinder is electrically started and closed by an external controller, the guide plate is arranged at an angle, and the shapes of both sides of the guide plate are adapted to the shape of the inner wall of the nozzle, the connection between the guide roller and the nozzle is fixedly connected with a sealing gasket, and the guide rollers are transmission-connected with belts.

[0016] Preferably, the nozzle is fixedly connected to an external magnetic pump, the magnetic pump is interconnected with an external electrolyte pipe, suction holes are symmetrically opened at the bottom of the electrolytic shell, the suction holes are interconnected with an external peristaltic pump, the peristaltic pump and the magnetic pump are both electrically controlled to start and stop by an external controller, and a hollow guide column is arranged on the top of the cover plate, and the hollow guide column is interconnected with an external gas treatment box.

[0017] Preferably, an anode is provided at the bottom of the electrolysis shell, a cathode is provided at the bottom of the cover plate, the electrolysis shell is externally connected to a device power supply, the positive electrode of the device power supply is fixedly connected to the anode, and the negative electrode of the device power supply is fixedly connected to the cathode.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The roller is rotated indirectly by rotating the driving block, and then the roller drives the sponge sleeve on its surface to rotate forward and reverse periodically, ensuring that the electrolyte can fully contact the surface of the copper foil. Due to the softness and good absorbency of the sponge sleeve itself, the sponge sleeve can effectively absorb and evenly distribute the electrolyte, thereby greatly improving the uniformity of electrolytic deposition. In addition, the periodic forward and reverse rotation of the roller and the sponge sleeve can also effectively avoid the local over-plating or under-plating of the copper foil during the electroplating process, further improving the surface quality of the copper foil. Secondly, due to the good elasticity and adaptability of the sponge sleeve, the sponge sleeve can fit tightly on the surface of the copper foil, effectively preventing the copper foil from shaking or displacing during the electroplating process. This stability not only ensures the smooth progress of the electroplating process, but also reduces the risk of equipment failure and improves production efficiency.

[0020] Compared with the existing fixture technology based on conductive materials, the contact assembly ensures that the electrolyte can fully contact the surface of the copper foil through the periodic positive and negative rotation of the roller and the sponge sleeve and the good adsorption, thereby greatly improving the uniformity of electrolytic deposition. Although the conductive fixture in the prior art can reduce obstruction, it is often difficult to achieve such a high level of uniformity due to its design and manufacturing limitations. Secondly, in terms of production cost, the contact assembly further reduces the production cost by reducing the manufacturing and maintenance costs of the fixture and reducing the production of defective products. The conductive fixture in the prior art often has a higher production cost due to the need for higher precision and cost investment;

[0021] Among them: because the driving block is composed of three concentric ellipses, when the driving block rotates, the contact surface between its surface and the resistance rod can maintain a stable moving trajectory. Due to the natural fluidity of the elliptical shape and the symmetrical angle between them, the rotation of the driving block can be smoothly transmitted to the resistance rod, so that the roller can smoothly rotate forward and backward. The smooth rotation not only ensures the position stability of the copper foil during the electroplating process and avoids shaking or displacement, but also ensures that the electrolyte can be evenly distributed on the surface of the copper foil, thereby greatly improving the uniformity of electrolytic deposition and the surface quality of the copper foil.

[0022] Among them: the meshing of the gear and the rack can ensure the stability and accuracy of the transmission process, reducing the errors caused by friction, wear and other factors. In the copper foil surface treatment equipment, accuracy and stability are very important to ensure the uniformity and consistency of the copper foil surface. Compared with other transmission methods, the contact area between the gear and the rack is large and the friction coefficient is small, so it can reduce energy loss and improve transmission efficiency, which helps to maintain the stability and continuity of the current, thereby further improving the uniformity of electrolytic deposition and the surface quality of the copper foil;

[0023] Among them: since the sponge cover has excellent softness and absorbency, the sponge cover can effectively absorb and evenly distribute the electrolyte. When the copper foil passes through the roller and the sponge cover, the contact between the sponge cover and the copper foil will cause the electrolyte to be compressed and evenly distributed on the surface of the copper foil. This dynamic process ensures sufficient contact between the electrolyte and the surface of the copper foil, thereby improving the uniformity of electrolytic deposition. Secondly, the periodic forward and reverse motion of the roller and the sponge cover can ensure that all parts of the copper foil are evenly treated with the electrolyte. When the copper foil moves to the gap between the two rollers, the copper foil not only remains stable, but also can directly contact the electrolyte, reducing the problem of uneven electrolyte distribution caused by the obstruction of the fixture.

[0024] 2. The cylinder output shaft extends to push the double-headed connecting rod, which in turn drives the rotating plate to rotate, and then the rotating plate drives the guide plate to rotate synchronously, so that the flow rate of the electrolyte gradually decreases above the copper foil, thereby guiding the electrolyte to gradually extend from the upper surface of the copper foil to both sides. As the electrolyte is sprayed, the bottom of the copper foil gradually contacts the electrolyte, and the electrolyte on the upper surface will be washed by the electrolyte that continues to be sprayed, ensuring that the upper and lower surfaces of the copper foil can fully contact the electrolyte, thereby avoiding the problem of excessive electrolytic reaction caused by long-term contact of the lower surface with the electrolyte, which helps to improve the uniformity of electrolytic deposition, making the copper layer of the copper foil more evenly distributed, and improving the overall flatness and performance consistency of the copper foil. Secondly, due to the uniform distribution of the electrolyte, the copper foil surface is not prone to excessive corrosion or impurity deposition caused by long-term contact with the electrolyte, which helps to reduce the generation of defects such as pits and spots on the copper foil surface and improve the surface quality of the copper foil.

[0025] Compared with the existing high elastic modulus lithium copper foil surface treatment equipment based on direct current electrodeposition process, the guide component avoids the problem of excessive electrolytic reaction caused by long-term contact of the lower surface with the electrolyte by controlling the flow rate and distribution of the electrolyte. In contrast, the existing technology often finds it difficult to effectively control the flow and distribution of the electrolyte, resulting in poor uniformity of electrolytic deposition. Secondly, due to the uniform distribution and flushing effect of the electrolyte, the guide component can reduce the excessive corrosion and impurity deposition problems on the surface of the copper foil, thereby improving the surface quality of the copper foil. In contrast, the copper foil surface in the existing technology is prone to defects such as pits and spots. Finally, the existing technology often requires higher operating skills and experience requirements, and has low production efficiency. The guide component not only reduces the technical requirements for operators, but also has a simple structure and is easy to implement.

[0026] Among them: first, the torsion spring can provide stable elastic support for the guide plate. When the guide plate collides with the electrolyte flow and encounters resistance during rotation, the torsion spring can automatically adjust its torque to maintain the stable rotation and position of the guide plate, ensuring accurate control of the electrolyte flow rate and direction. Secondly, due to the impact of the electrolyte flow, the guide plate will be subjected to sudden impact or vibration. At this time, the torsion spring can effectively absorb these impacts and vibrations, reducing their impact on the overall performance and stability of the equipment;

[0027] Among them: the guide holes can reduce the resistance of the guide plate when blocking the flow of electrolyte. When the electrolyte flows through the guide holes, smaller eddies and turbulences will be formed, thereby reducing the direct impact and friction on the guide plate and reducing the risk of wear and damage. Secondly, the guide holes can also increase the contact area between the guide plate and the electrolyte, which not only helps to better adjust the flow rate and direction of the electrolyte, but also improves the mixing and dispersion effect of the electrolyte, so that the upper and lower surfaces of the copper foil can be more evenly and fully covered with the electrolyte. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a frontal perspective schematic diagram of the main structure of the present invention;

[0029] Figure 2 It is a rear perspective schematic diagram of the main structure of the present invention;

[0030] Figure 3 For the present invention Figure 2 A magnified three-dimensional schematic diagram of the structure at center A;

[0031] Figure 4 For the present invention Figure 2 The enlarged three-dimensional schematic diagram of the structure at B in the middle;

[0032] Figure 5 It is a cross-sectional stereoscopic schematic diagram of the main structure of the present invention;

[0033] Figure 6 For the present invention Figure 5 The enlarged three-dimensional schematic diagram of the structure at C in the middle;

[0034] Figure 7 For the present invention Figure 5 The enlarged three-dimensional schematic diagram of the structure at D in the middle;

[0035] Figure 8 It is a partially cutaway stereoscopic schematic diagram of a guide assembly of the present invention;

[0036] Fig. 9 For the present invention Figure 8 Enlarged three-dimensional schematic diagram of the structure at E in the middle.

[0037] In the figure:

[0038] 11. Base; 12. Electrolytic shell; 13. Cover plate;

[0039] The contact assembly includes: 21, driving block; 22, baffle; 23, sliding rod; 24, resisting rod; 25, connecting piece; 26, rack; 27, roller; 28, gear; 29, power belt; 210, sponge cover;

[0040] The guide assembly includes: 31, nozzle; 32, guide roller; 33, rotating plate; 34, cylinder; 35, double-headed connecting rod; 36, torsion spring; 37, guide plate; 38, guide hole. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figures 1 to 9 The present invention provides an embodiment: a high elastic modulus lithium battery copper foil surface treatment device based on a direct current electrodeposition process, which is used to make the copper foil fully contact with the electrolyte, including a base 11, the top of the base 11 is symmetrically fixedly connected with fixed columns, the tops of the two fixed columns are fixedly connected with an electrolytic shell 12, the outer surface of the electrolytic shell 12 is movably connected with a cover plate 13, a contact component for making the copper foil fully contact with the electrolyte is arranged above the base 11, and a guide component for changing the flow rate and flow direction of the electrolyte is arranged on the outer side of the electrolytic shell 12.

[0043] The contact assembly includes a driving block 21, which is arranged below the electrolytic shell 12. The bottom of the electrolytic shell 12 is symmetrically fixedly connected with a rotating seat, and the driving block 21 is rotatably connected to the inside of the rotating seat. The top of the base 11 is symmetrically fixedly connected with a baffle 22, and the outer surface of the baffle 22 is slidably connected with a slide rod 23. The side where the two slide rods 23 are close to each other is symmetrically fixedly connected with a resistance rod 24, and the top of the slide rod 23 is fixedly connected with a connecting piece 25.

[0044] The contact assembly also includes two racks 26, which are fixedly connected to the tops of the corresponding connectors 25, respectively. The electrolytic shell 12 penetrates the surface and is linearly and equidistantly arranged and symmetrically rotatably connected to a plurality of rollers 27. The outer surfaces of the rollers 27 located in the middle are fixedly connected to gears 28, and the outer surfaces of the rollers 27 on each side are transmission-connected to a power belt 29. A sponge cover 210 is sleeved on the side of each roller 27 away from the gear 28.

[0045] The guide assembly includes two nozzles 31, which are fixedly connected to the two sides of the electrolytic shell 12 respectively. The nozzles 31 penetrate the surface and are linearly equidistantly arranged and are symmetrically rotatably connected with guide rollers 32. The outer surfaces of the guide rollers 32 away from the base 11 are fixedly connected with rotating plates 33. The outer surface of the electrolytic shell 12 is symmetrically fixedly connected with cylinders 34. The output shaft of the cylinder 34 is fixedly connected with a double-headed connecting rod 35. The double-headed connecting rod 35 is slidably connected to the inside of the rotating plate 33. The outer surface of each guide roller 32 is fixedly connected with a torsion spring 36. The outer surface of each torsion spring 36 is fixedly connected with a guide plate 37. Each guide plate 37 has a guide hole 38 opened through the surface.

[0046] The driving block 21 is drivenly installed on an external motor, and the external motor is electrically controlled to start and stop by an external controller. The driving block 21 is composed of three concentric ellipses, and the angle between each ellipse and the other two ellipses is one hundred and twenty degrees. The gear 28 and the rack 26 are meshed with each other, and the sponge sleeve 210 is made of polytetrafluoroethylene sponge.

[0047] The cylinder 34 is electrically started and closed by an external controller. The guide plate 37 is tilted, and the shapes of both sides of the guide plate 37 are compatible with the inner wall shape of the nozzle 31. The connection between the guide roller 32 and the nozzle 31 is fixedly connected with a sealing gasket, and the guide rollers 32 are connected with belts for transmission.

[0048] The nozzle 31 is fixedly connected to an external magnetic pump, the magnetic pump is connected to an external electrolyte pipe, suction holes are symmetrically provided at the bottom of the electrolysis shell 12, the suction holes are connected to an external peristaltic pump, and both the peristaltic pump and the magnetic pump are electrically started and shut down by an external controller. A hollow guide column is provided on the top of the cover plate 13, and the hollow guide column is connected to an external gas treatment box.

[0049] An anode is disposed at the bottom of the electrolysis shell 12, a cathode is disposed at the bottom of the cover plate 13, and the electrolysis shell 12 is externally connected to a device power supply, the positive electrode of the device power supply is fixedly connected to the anode, and the negative electrode of the device power supply is fixedly connected to the cathode.

[0050] The working principle of the present invention in combination with the above is as follows:

[0051] The following is the initial state: the cylinder 34 is not in the extended state, the abutment rod 24 is not in contact with the corner of the driving block 21, the slide bar 23 is located in the middle of the baffle 22, the sponge sleeve 210 is not compressed, and the torsion spring 36 is not in the tensioned state.

[0052] The following are the specific steps of the work:

[0053] Among them, the preliminary work for surface treatment of copper foil:

[0054] like Figures 1 to 7As shown, the operator manually puts the copper foil into the electrolytic shell 12, at which time the copper foil is located on the top of the power belt 29 and the sponge sleeve 210, and then the operator closes the cover 13 and makes the top of the electrolytic shell 12 in a sealed state. At this time, the operator controls the external controller and electrically controls the magnetic pump to pump the electrolyte inside the external electrolyte tube, and then the electrolyte is transported to the inside of the nozzle 31 through the magnetic pump.

[0055] Among them, the copper foil surface is fully in contact with the electrolyte:

[0056] like Figure 2 and Figure 4 as well as Figure 8 and Fig. 9 As shown, the operator manually controls the external controller and electrically controls the air intake of the cylinder 34. At this time, the output shaft of the cylinder 34 extends outward. At this time, the output shaft of the cylinder 34 pushes the double-headed connecting rod 35 to move. Since the rotating piece 33 is fixedly connected to the guide roller 32, the guide roller 32 starts to rotate synchronously. Then, the movement of the double-headed connecting rod 35 pushes the guide roller 32 and drives the guide roller 32 to rotate. The rotation of the guide roller 32 drives all the guide rollers 32 to realize synchronous rotation through the belt, and further the guide roller 32 drives the guide plate 37 to rotate synchronously.

[0057] At the same time, when the electrolyte enters the nozzle 31, the electrolyte first contacts the guide plate 37. Since the guide plate 37 is inclined and the shapes of its two sides are adapted to the inner wall of the nozzle 31, the electrolyte is divided into two parts under the action of the guide plate 37 and the guide hole 38: one part is the mainstream, flowing along the surface of the guide plate 37; the other part is the diversion, continuing to move forward through the gap between the guide plate 37 and the inner wall of the nozzle 31.

[0058] Under the guidance of the next guide plate 37, the branch flow merges with the mainstream inside the nozzle 31 and accelerates the mainstream. When the accelerated electrolyte is sprayed out from the nozzle 31, it collides with the electrolyte on the other side to generate strong convection. The convection causes the electrolyte to diffuse rapidly in the space to form a uniform liquid film.

[0059] At this time, the mixed electrolyte impacts the surface of the copper foil at a high speed and forms a strong impact area in the middle of the copper foil. Since the impact directions of the electrolytes on both sides are opposite, the copper foil is subjected to opposite forces and remains relatively still. At the same time, due to the fast speed of the electrolyte and the large impact force, the impurities and oxides on the surface of the copper foil can be quickly removed, providing a good substrate for the subsequent copper layer deposition.

[0060] At the same time, under the action of impact force, the electrolyte quickly disperses on the surface of the copper foil to form a uniform electrolyte layer. This electrolyte layer not only covers the upper surface of the copper foil, but also penetrates into the pores of the copper foil through capillary action, providing sufficient copper ion source for subsequent copper layer deposition.

[0061] As the electrolyte is continuously sprayed and the electrolyte layer on the upper surface of the copper foil gradually thickens, the electrolyte begins to overflow from the upper surface of the copper foil and flow into the electrolytic housing 12. At this time, the electrolyte level in the electrolytic housing 12 gradually rises, and the lower surface of the copper foil also begins to contact the electrolyte.

[0062] Since the upper surface of the copper foil contacts the electrolyte first, and the electrolyte on its upper surface is continuously flushed by the subsequent electrolyte, while the lower surface is in stably contact with the electrolyte at this time, the lower surface of the copper foil will be in more sufficient contact with the electrolyte as the electrolyte level continues to rise. As a result, the lower surface of the copper foil is in contact with the electrolyte for a long time at this time, thus making up for the gap that the upper surface of the copper foil contacts the electrolyte first.

[0063] As the electrolyte is continuously sprayed and flushed, the new electrolyte will continuously flush away the previous electrolyte, thereby ensuring that the copper foil surface always maintains a fresh electrolyte layer. This flushing effect not only helps to remove impurities and oxides on the copper foil surface, but also prevents the formation of an oxide film or other undesirable attachments on the copper foil surface.

[0064] Finally, under the uniform scouring and flushing action of the electrolyte, the upper and lower surfaces of the copper foil are evenly covered with a fresh electrolyte layer. This electrolyte layer provides sufficient copper ion source and good substrate conditions for the subsequent copper layer deposition, thus ensuring the high-quality production of lithium battery copper foil.

[0065] Among them, the copper foil surface is treated:

[0066] like Figures 2 to 7 As shown, it can be seen from the above steps that at this time the electrolyte housing 12 is full of electrolyte, and then the sponge sleeve 210 absorbs the electrolyte and expands due to its own adsorption characteristics. At this time, the operator electrically controls the external motor and the power supply of the equipment to start through the external controller.

[0067] At this time, the external motor starts, and its output shaft drives the driving block 21 to start rotating. The edge of its ellipse begins to conflict with the abutment rod 24 fixed on the slide bar 23. Because the angle between each ellipse in the driving block 21 and the other two ellipses is one hundred and twenty degrees, the abutment rod 24 is abutted by the driving block 21 and moves stably. Since the slide bar 23 is slidably connected to the baffle 22, the abutment force of the abutment rod 24 causes the slide bar 23 to slide back and forth on the baffle 22. The reciprocating sliding process drives the rack 26 connected thereto to move back and forth synchronously through the connecting piece 25 fixed on the top of the slide bar 23.

[0068] Since the rack 26 meshes with the gear 28 on the middle roller 27, the middle roller 27 starts to rotate forward and reverse periodically under the drive of the rack 26. At the same time, due to the transmission of the power belt 29 between the rollers 27, the rotation of the middle roller 27 will drive all rollers 27 to rotate synchronously through the power belt 29.

[0069] During this process, the copper foil between the roller 27 and the sponge sleeve 210 is affected by the rotation of the roller 27 and begins to slide back and forth stably. At this time, the contact position between the copper foil and the sponge sleeve 210 keeps changing, and the copper foil can contact the electrolyte more effectively.

[0070] When the copper foil contacts the sponge cover 210, part of the electrolyte is absorbed and stored inside the sponge cover 210 due to the adsorption effect of the sponge cover 210. As the copper foil slides, the contact position between the copper foil and the sponge cover 210 gradually moves away. At this time, the electrolyte inside the sponge cover 210 begins to be discharged and absorbed under its own pressure and the squeezing of the sliding of the copper foil. The absorption and discharge process of the electrolyte ensures that the copper foil is always in contact with fresh electrolyte during the sliding process, thereby improving the effect of electrodeposition.

[0071] At the same time, since the copper foil slides in the gaps between the rollers 27, these gaps provide space for the flow of the electrolyte, so that the copper foil can be in contact with the electrolyte more comprehensively, thereby effectively avoiding the local over-thickness or over-thinness of the copper foil during the electrodeposition process, thereby ensuring the uniformity of the coating.

[0072] In addition, it can be seen from the above steps that the device power supply has been started at this time, and the positive pole of the device power supply is connected to the anode, and the negative pole is connected to the cathode. Then, under the action of the electric field, the copper ions in the electrolyte begin to move toward the cathode and are deposited on the surface of the copper foil to form a copper layer.

[0073] Since the copper foil slides stably back and forth between the roller 27 and the sponge sleeve 210, each position on the surface of the copper foil has the opportunity to fully contact the electrolyte, thereby ensuring the uniform deposition of the copper layer on the surface of the copper foil. In addition, the absorption and discharge of the electrolyte by the sponge sleeve 210 further enhances the fluidity of the electrolyte and improves the efficiency of electrodeposition.

[0074] In addition, during the electrodeposition reaction, a certain amount of harmful gases will be generated due to the action of the electric current and the chemical reaction of the electrolyte. These gases will gradually accumulate inside the electrolytic shell 12 due to the increase in internal temperature and the release of gas in the electrolyte caused by the electrothermal reaction. At this time, based on the chimney effect, these harmful gases naturally rise due to the temperature difference and density difference, and flow upward along the hollow guide column.

[0075] When the harmful gases in the hollow guide column reach a certain concentration, they will enter the external gas treatment box through the top opening of the hollow guide column, and the operator can collect the gas in the gas treatment box for subsequent treatment.

[0076] The copper foil is collected and the inside of the electrolytic housing 12 is cleaned:

[0077] like Figure 1 to Figure 2 As shown, after the copper foil is electroplated, the operator needs to stop the electroplating process by turning off the power of the equipment through the external controller, and then start the external peristaltic pump. By utilizing the characteristic that the external peristaltic pump is interconnected with the suction holes symmetrically opened at the bottom of the electrolytic shell 12, the electrolyte inside the electrolytic shell 12 is extracted through the suction holes to achieve the recovery or treatment of the electrolyte.

[0078] After the electrolyte is extracted, the operator opens the cover plate 13 and uses professional tools to take the copper foil that has undergone electrodeposition treatment out of the electrolytic housing 12 .

[0079] After completing the collection and cleaning of the copper foil, it is necessary to observe the status of the sponge cover 210. As the use time increases, the sponge cover 210 will lose some of its functions due to absorbing too much electrolyte or other impurities. If the operator finds obvious stains or deformation on the surface of the sponge cover 210, it is necessary to replace it with a new sponge cover 210 in time.

[0080] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0081] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high elastic modulus lithium battery copper foil surface treatment device based on a direct current electrodeposition process, used to make the copper foil fully contact with the electrolyte, comprising a base (11), the top of the base (11) is symmetrically fixedly connected with fixed columns, the tops of the two fixed columns are fixedly connected with an electrolytic shell (12), and the outer surface of the electrolytic shell (12) is movably connected with a cover plate (13), characterized in that: A contact component for making the copper foil fully contact with the electrolyte is arranged above the base (11), and a guide component for changing the flow rate and flow direction of the electrolyte is arranged on the outside of the electrolytic shell (12).

2. The high elastic modulus lithium battery copper foil surface treatment equipment based on direct current electrodeposition process according to claim 1 is characterized in that: The contact assembly comprises a driving block (21), the driving block (21) being arranged below the electrolytic shell (12), the bottom of the electrolytic shell (12) being symmetrically fixedly connected to a rotating seat, the driving block (21) being rotatably connected to the inside of the rotating seat, the top of the base (11) being symmetrically fixedly connected to a baffle (22), the outer surfaces of the baffles (22) being slidably connected to sliding rods (23), the sides of the two sliding rods (23) being symmetrically fixedly connected to a resisting rod (24), and the tops of the sliding rods (23) being fixedly connected to connecting pieces (25).

3. The high elastic modulus lithium battery copper foil surface treatment equipment based on direct current electrodeposition process according to claim 2 is characterized in that: The contact assembly further comprises two racks (26), the two racks (26) being fixedly connected to the tops of the corresponding connecting members (25) respectively; the electrolytic shell (12) penetrates the surface and is linearly and equidistantly arranged and symmetrically rotatably connected to a plurality of rollers (27); the outer surfaces of the rollers (27) located in the middle are fixedly connected to gears (28); the outer surfaces of the rollers (27) on each side are transmission-connected to a power belt (29); and a sponge sleeve (210) is sleeved on the side of each roller (27) away from the gear (28).

4. The high elastic modulus lithium battery copper foil surface treatment equipment based on direct current electrodeposition process according to claim 1 is characterized in that: The guide assembly comprises two nozzles (31), the two nozzles (31) are respectively fixedly connected to two sides of the electrolysis shell (12), the nozzles (31) penetrate the surface and are linearly and equidistantly arranged and are symmetrically rotatably connected to guide rollers (32), the outer surfaces of the guide rollers (32) away from the base (11) are fixedly connected to rotating plates (33), the outer surfaces of the electrolysis shell (12) are symmetrically and fixedly connected to cylinders (34), the output shafts of the cylinders (34) are fixedly connected to double-headed connecting rods (35), the double-headed connecting rods (35) are slidably connected to the inside of the rotating plates (33), the outer surface of each guide roller (32) is fixedly connected to a torsion spring (36), the outer surface of each torsion spring (36) is fixedly connected to a guide plate (37), and each guide plate (37) is provided with a guide hole (38) through the surface.

5. The high elastic modulus lithium battery copper foil surface treatment equipment based on direct current electrodeposition process according to claim 3 is characterized in that: The driving block (21) is drivenly mounted on an external motor, and the external motor is electrically controlled to start and stop by an external controller. The driving block (21) is composed of three concentric ellipses, and the angle between each ellipse and the other two ellipses is one hundred and twenty degrees. The gear (28) and the rack (26) are meshed with each other, and the sponge sleeve (210) is made of polytetrafluoroethylene sponge material.

6. The high elastic modulus lithium battery copper foil surface treatment equipment based on direct current electrodeposition process according to claim 4 is characterized in that: The cylinder (34) is electrically controlled to start and stop by an external controller. The guide plate (37) is arranged to be inclined, and the shapes of both sides of the guide plate (37) are mutually adapted to the shape of the inner wall of the nozzle (31). The connection between the guide roller (32) and the nozzle (31) is fixedly connected with a sealing gasket, and the guide rollers (32) are transmission-connected with a belt.

7. The high elastic modulus lithium battery copper foil surface treatment equipment based on direct current electrodeposition process according to claim 4 is characterized in that: The nozzle (31) is fixedly connected to an external magnetic pump, and the magnetic pump is interconnected with an external electrolyte pipe. Suction holes are symmetrically provided at the bottom of the electrolytic shell (12), and the suction holes are interconnected with an external peristaltic pump. Both the peristaltic pump and the magnetic pump are electrically controlled to start and stop by an external controller. A hollow guide column is provided on the top of the cover plate (13), and the hollow guide column is interconnected with an external gas treatment box.

8. The high elastic modulus lithium battery copper foil surface treatment equipment based on direct current electrodeposition process according to claim 1 is characterized in that: An anode is arranged at the bottom of the electrolysis shell (12), a cathode is arranged at the bottom of the cover plate (13), and the electrolysis shell (12) is externally connected to a device power supply, the positive electrode of the device power supply is fixedly connected to the anode, and the negative electrode of the device power supply is fixedly connected to the cathode.

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